Steam-jacket kettle



(No Model.)

E. WHITELEY.

STEAM JACKET KETTLE. I No. 251,751. 1 Patented Jan. 8,1882.

@1 y, Witnesses. g lmen/j 1mm 1 UNITED STATES PATENT OFFICE.

EDWARD- WHITELEY, or ANTEIM, new HAMPSHIRE.

STEAM-JACKET KETTLE.

SPECIFICATION forming part of Letters Patent No. 251,751, dated January 3, 1882.

Application filed April 4, 1881. (No model.)

. of Antrim, in the county of Hillsborough and State of New Hampshire, have invented new and useful Improvements in Steam-Jacket Kettles, of which the following is a specification.

This invention relates to steam-jacket kettles for use in cooking food in large quantities by steam, varying in capacity, say, from five V to two hundred gallons, and used mainly in hotels, hospitals, and other institutions.

The nature of the inventionis fully described below.

In the accompanying drawings, in which similarletters of reference indicate like parts, Figure 1 is a transverse vertical section of a steam-jacket kettle embodying my invention. Fig. 2 is a front elevation of the same.

A represents the sides or body of the kettle, B, the cover; 0, the inner skin or hottom; D, the outer skin or jacket; E, the steam-pipe, and F the waste-pipe, the last two respectively injecting steaminto and taking it from the space between the two skins O and D, for the purpose of heating and cooking the contents of the kettle.

G and G are pipes through which the soup or other semi-liquid food is drawn 0d. The

ordinary way of inserting these pipes G G has been to drill and tap both the inner and outer kettle-i. 0., the inner and outer castiron skins,.G D(cored out to produce the steam-space,) cut a thread on each pipe to be inserted, and pass it in through both skins. This has been a difficult and expensive opertion, there being two steam-joints very diflicnlt to make tight and often requiring the aid of an expander, and there being also the danger of the destruction of the pipe, weakened by the screw-thread in the steam-chamber. To obviate this difficulty I turn up (or in) the lower skin, D, wherever I desire to insert a pipe, G, thus forming a recess, D. By this means I save tapping the jacket or outer skin, D, and tap only the inner bottom or skin, 0,

which is an easy task, and I also save passing the pipes through the steam-chamber, and hence have no steam-joints to make.

In the invention described in Letters Patcut No. 39,603, issued to me August 18, 1863, a solid block of metal connects the inner and outer skins, through which block the pipe is passed. This has been found to be objectionable on account of the distance which the pipe has to be passed through solid metal and on account of the unequal cooling in the process of casting of this mass of metal, as compared with the rest of the kettle, thus injuring its strength. By forming this recess D the mass of metal referred to is avoided, the same thickness being had throughout. Hence all parts cool equally, and the amount of metal to be tapped is but the thickness or" one skin. H is the cast-iron plug for removing the core in casting.

I is alower, and J an upper, plate or strainer, the upper one being used for cooking food, into which passes the aroma from the soup below, and the lower one straining the soup. These plates rest on small ledges K cast in the kettle. They are not continuous, extending around the kettle, but are short small projections or ledges, whose only object is to support the strainers or plates 1 J in such a manner that they can be easily dropped into place and easily removed. These ledges are made in the shape shown, as a continuous ledge extending around the interior of the kettle would be difficult, perhaps impossible, to cast and would interfere with the removal of the strainers.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-- I The herein-described improved steam-jacket kettle, consisting of the kettle A, having the inner and outer skins, O D, the outer skin being provided with the recess D, constructed substantially as shown, for the purpose of allowing the insertion of a pipe in the inner skin or bottom, 0, without piercing the outer skin or entering the steam-chamber, as above set forth.

EDWVARD \VHITELEY.

Witnesses:

HENRY W. WILLIAMS, GEORGE V. MALLON. 

